html{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
}
body{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
}
#app{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
}
.app-container{
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}